Dough-mixing machine.



ventor.

7 Wt U -MRE-WW@ Httom'egs PATENTED 00T. 3, 1905. E. E. WARD.

DOUGH MIXING MACHINE.

APPLIOATION FILED 1120.13, 1904.y

Witnesses /3 /fff Inventor.

Httornegs PATBNTED 0011.3, 1905.

E. E. WARD. DUGH MIXING MACHINE.

rrLIoATIoN FILED Dmla, 1904.

3 SHEETS-SHEET 3.

72d, Inventor y Httomegs Witnesses ELMER E. l/VARD, OF SAL'l` LAKE CITY,UTH.

DOUGH-MIXING MACHINE.

Specication of Letters Patent.

Patented Oct. 3, 1905.

Application filed December 13, 1904. Serial No. 236,703.

Mixing Machine, of which the following is a.

specification.

This invention relates to dough mixing and kneading machines; and ingeneral its object is to improve Vand simplify the construction andincrease the efficiency of operation of such devices.

lt is furthermore designed to embody the invention in the nature of acomplete attachment capable of being fitted to any ordinary receptaclewithout alteration or change therein and to clamp the device firmly uponthe receptacle, so as to prevent it from working loose thereon.

In dough stirring and kneading devices it is a common experience to havethe dough rise around the stirrer at the center of the batch of dough,which interferes with the convenient manipulation of the stirrer andalso impairs the mixing or kneading of the dough, and in view of thisdifficulty it is proposed to arrange the stirrer so as to prevent such arising of the dough at the center of the batch.

ln addition to the tendency to rise at the center of the batch there isa stage in the mixing or kneading of the dough when it becomes tough andmaterially interferes with the operation of the stirrer, and in view ofthis difficulty it is designed to provide for adjustably elevating thestirrer, so as to work through the upper portion only of the batch ofdough until the tough stage has passed, when the stirrer may be loweredto its original position for finishing the stirring and kneadingoperation.

lV ith these and other objects in view the present invention consists inthe combination and arrangement of parts, as willbe hereinafter morefully described, shown in the accompanying drawings, and particularlypointed out in the appended claims, it being understood that changes inthe form, proportion, size, and minor details may be made within thescope of the claims without departing from the spirit or sacrificing anyof the advantages of the invention.

In the accompanying drawings, Figure 1 is a vertical central sectionalview of one embodiment of the present invention mounted upon areceptacle. Fig. 2 is a plan view thereof. Fig. 3 is a view inperspective of thesupporting-bar or cross-head and the several partswhich are supported thereon in separated relation. Fig. 4 is afragmentary elevation of the receptacle for the support of the presentapparatus at right angles to Fig. 1, showing the manner of clamping thereceptacle upon the table or other support. Fig. 5 is a detailperspective view of the clamping means. Fig. 6 is a detail perspectiveview of the preferred embodiment of the kneading or stirring apparatus.Fig. 7 is an enlarged detail sectional view showing the mounting of thestirrer member and the operating crank-handle upon the supportingcross-head of the apparatus.

Like characters of reference designate corresponding parts in each andevery figure of the drawings.

The pail or receptacle l of the improved dough mixing and kneadingmachine may be of any suitable form and construction. Attached to itsbottom are two elongated socketpieces or tubes 2 and 3, which preferablyare square or rectangular in cross-section. The socket-pieces 2 and 3are parallel with each other and are open at each end. They are locatedadjacent to the periphery of the pailbottom on opposite sides thereof,so as to be nearer the edge of the pail than the center thereof. Clamps4 and 5, having set-screws 6 and4 7 and formed with shank portions 8 and9, shaped to fit the socket-pieces 2 and 3, are provided for attachingthe pail l securely to a table or other support. The clamps 4 and 5 areconnected by or formed integrally upon the opposite ends of a bar 10.

By disposing the socket-pieces 2 and 3 in parallel relation with eachother and separating them to such a degree that they are nearer the edgeof the pail than the center thereof they act not only as ribs tostrengthen and brace the bottom of the receptacle, but also asprojections or legs to support and balance the device. Furthermore, byseparating them to the extent indicated the clamps et and 5 are enabledmore easily to maintain the receptacle rigid upon the table or othersupport, and it is unnecessary to tighten the clamps as much as would benecessary if the socket-pieces were disposed close to each other or onlyone socket-piece were employed. For this reason scratching or bruisingof the table by excessive tightening of the clamps is avoided.

Arranged across the upper end of the pail or receptacle l is a bar 11.At one end the IOO '23, which is set rigidly into the bar 11.

bar 11 is formed with two diverging arms 12 and 13, the ends of whichare bent to form hooks 14, adapted to'engage the rim of the pail 1. Atthe opposite end the bar 11 is formed with two flat diverging arms 15and 16, which rest upon the rim of the receptacle, but are not providedwith hooks. Adjacent to the arms 15 and 16 the bar 11 has a'preferablyrectang'ular groove or depression 11, in which is seated a sliding plate17, formed at its outer end, which is located between the arms 15 and16, with a hook 18 adapted to engage the rim of the receptacle oppositethe hooks 14. It will be observed that the groove or depression in whichit is mounted causes the sliding hook-plate 17 to lie in the samehorizontal plane with the fiat arms 15 and 16 of bar 11. Formed upon thesliding plate 17 are two upwardly-extending lugs 19 19, be-

tween which is disposed the disk-shaped end 2O of a lever 21. rIhe lugs19 19 are formed at opposite ends of a longitudinal slot 22 in thesliding' plate 17. Extending through the disk 20, slot 22, and bar 11 isa fulcrum-pin It will be observed that the pin 23 is locatedeccentrieally with respect tothe disk 20, whereby upon moving the lever21 one way or the other the sliding plate 17 is caused to movelongitudinally upon the bar 11 to throw its hooked end 18 into or out ofengagement with the rim of the receptacle l.

The central portion of the bar 11 is perfo- .rated to receive a hub 24.which is provided with an annular flange 25, that rests upon the uppersurface of the bar 11 and is attached thereto by means of rivets 26. Atits lower end the hub 24 is curled inward and upward to form an annulartrough 27, adapted to prevent grease, oil, or dirt from dropping intothe receptacle below. Seated in the hub 24 is a revolving journal 28,which is formed near its lower end with an annular groove 29, into whichprojects the end of an adjustingscrew 30, extending through the hub 24.By retracting the screw the journal 28 may be removed from the hub 24.for cleaning or lubricating purposes. Near its upper end the journal 28is provided with an annular flange 31, which fits into theinternally-rabbeted upper end of the hub 24. Above the flange 31 theupper end of the journal 28 is tapered, as shown at 32, and is formedwith a vertical rib or spline 33. The crank-handle 34 is formed with atapered bore to receive the tapered upper end 32 of the journal 28 andwith a vertical groove to receive the rib 33, whereby when the crank isrevolved its rotation is transmitted to the hub 28.

Extending verticallythrough an irregular.

, or non-circular bore in the journal 28 is the caused to revolve withthe journal 28. Formed in the nou-circular upper end of the stirrer 36is a plurality of notches 37. A lever 38, having a downwardly-bent rearend 39, is pivotally mounted upon the crank by means of a rivet or bolt40. A lug or projection 41 is provided on the crank 34 to limit themovement in one direction of the lever 38. The short end of the lever 38is adapted to engage one of the notches 37 in the end 35 of the stirrer36 and is rigidly held in such engagement by the end 39 binding on thecrank at that point. By means of the lever 38 and notches 37 the stirrer36 may be adjusted vertically in its journal 28 to dispose its lower endclose to or away from the bottom of the receptacle or may be removedentirely from the journal 28.

Upon the upper end of the stirrer 36, bclow the hub 24 and journal 28,is mounted a cup or dished disk 41, adapted, in conjunction with theannular trough 27 at the lower end of the hub 24, to insure that no oil,grease, or dirt will drop into the receptacle.

The stirrer 36, which preferably is made of rod metal, is formed belowthe dished disk 41 with` a downwardly-extending loop a, one end of whichis bent into an approximately circular portion It will be observed fromthe true circle indicated in dotted lines that the portion 7) is notquite circular in form. At its lower end the stirrer extends off at atangent to the approximately circular portion, as shown at c. lt thentakes a downward incline, as shown at (Z, and terminates close to theperiphery and bottom of the receptacle in a horizontal portion a.

Experience and practice have demonstrated that the form of stirrerdescribed produces excellent results and kneads the dough withexpedition. It will be observed thatthe approximately circular portion7) of the stirrer lies otfto one side of a line drawn centrally throughthe receptacle and that the lower end e of the stirrer is disposed atthe opposite side of the receptacle. For this reason the end ckneads thelower portion of the dough and the portion b kneads the middle orLipper' portion thereof. In practice it has been found that the dough inold forms of mixers tends to excessively rise at the center around thestirrer. This excessive tendency is etfectually combated in the presentdevice by the downwardly-extending loop a of the stirrer. lt also hasbeen found laborious in practice to mix the dough at a certain stage inthe operation of the device, due to the fact that the dough graduallybecomes tough during the kneading operation. This diflieulty has beencured in the present device by providing a vertically or longitudinallyadjustable stirrer, which can be kept near the bottom of the receptacleat first and raised therefrom as the dough arrives at the half-mixed andtough stage.

IIO

It will'be observed that the bar 11, with its rigid diverginglcgs,`provides a strong integral support for the stirrer and that thesliding hook-plate 17 serves only to hold the bar in position.Heretofore in a dough-mixer a sliding plate has been used; but, inaddition to acting as a` hook, it has been made to support one end ofthe bar with its stirrer and bearings, no diverging legs being providedon the sides of the plate for this purpose. Such prior constructionlacking such rigidity. the present device is designed as an improvementthereupon. As before remarked, it will be observed that the depressionin which the sliding plate 17 is mounted causes said plate to lie in thesame horizontal plane with the diverging arms and '16, whereby itsecurely grips the rim of the receptacle.

In the embodiment of the invention shown in Figs. 6 and 7 the mainfeatures of the device-such `as the stirrer 36, the supporting frame orcross head 11, with its hooked branches 12 and 13, the other branches 15and 16, and the clamping member 17, with its adjusting' clamp 20-areprecisely the same as hereinbefore described, the only differenceresiding in the manner of mounting the crankhandle 42. In this form ofthe device the cross-head 11 is provided with a central opening 43.through which projects a tubular openended hub 44, extending at the topand bottom of the cross bar or frame and having an external annularflange tted to the top of the cross-bar and rigidly connected thereto bymeans of rivets 46 or other suitable fastenings. The crank 42 isprovided at its inner end with an integral tubular open-ended journal47, rotatably fitted within the hub and designed to receive thenon-circular shank portion of the stirrer 36. Upon the top of thecrank-handle is an intermediately-pivoted latch or lever 38, designedfor alternate engagement with the respective notches 37 of the uppernon-circular end of the stirrer, as and for the purpose hereinbeforedescribed. The rear end portion of this latch or lever is bent down, asat 39, and has sufficient elasticity to frictionally bear upon thecrank-handle 42, so as to prevent accidental movement of the latch. Thecrankhandle 42 is provided upon its top with an upstanding stop 41, asin Fig. 2, to limit the movement of the latch-lever 38 and insure theproper engagement of the latter with the notched portion of the stirrer.Upon the under to frictionally engage the under side of the crank-handle42, w'hile its forward end is designed to take into an annular groove orchannel 51, formed externally in the hub 44,

whereby the journal 47 is held against end-l wise movement in the huband the crankhandleis held in'place; -A suitable stop projection 52depends from the boss 48 in the path of the latch-lever49, so as to stopthe latter when registered with the groove 51. As in the first-describedform of the device, the shank vportion of the stirrer is provided with adrip-cup 41 to catch such lubricant as may drip from the bearing. Theadvantage of the preferred form of bearing resides in its simplicity andease of assemblage and dis-v connection, asthere are practically but twomembers-the hub 44 and the journal 47- whereas in the form shown inFigs. 1 to 3,

inclusive, the journal 28 is separate from the crank-handle 34, andtherefore it is necessary to employ a number of other parts to effect.the connection of the journal with the crank and to prevent endwise playof the journal within the hub.

ln each form of the apparatus the operating crank-handle is providedwith an outer upstanding hand-grasp 53 and a similar handgrasp 54,located inwardly from the outer, hand-grasp. The inner hand-grasp 54 isemployed for rotating the crank in the initial stage of the kneading orstirring operation, as a great manyT rotations of the stirrer aredesired; but when the dough becomes tough the operator takes hold of theouter handgrasp 53, so as to obtain a greater leverage upon thecrank-handle. From this explanation it will be understood that theprovision of the inner and outer hand-grasps has a very importantadvantage, as the stirrer can be initially more quickly and moreadvantageously operated,for the path of movement of the operators handis comparatively short, and when greater leverage is necessary toovercome the increased resistance of the dough in its tough stage theoperator may shift his hand to the outermost hand-grasp, and therebyobtain the desired increase of leverage with a greater path of movementof the hand and a slower movement. i

Having thus-described the invention, what is claimed is- 1. A dough-mixer having a receptacle, abar provided at each end with divergingarms, one set only of the arms terminating in downturned hooks, theterminals of the other set of arms being iiat to rest on the rim of thereceptacle, and a slidably-adjustable plate working between the saidother arms and terminating in a hook to embrace the edge of thereceptacle. v

2. Adough-mixer havingareceptacle, abar thereacross provided with hookportions at one end and a depression at the other, a sliding plate inthe depression having a slot formed with a lug at each end, a leverhaving a disk-shaped end located between the lugs, and a pin passingeccentrically through the disk-shaped end of the lever, the slot in thsliding plate and the bar.

3. A dough-mixer having an endWise-ad- IOO IIO

justa-ble stirrer formed with a plurality of notches, a crank to rotatethe stirrer, a lever on the crank to engage the notches and adjustablysupporting the stirrer.

4. A dough-mixer comprising a supporting-frame having diverged arms atopposite ends, one set only of the arms being hooked to engage the topof a receptacle, a slidable hooked clamping member Working' between theother set of diverged arms to grip the upper edge of a receptacle, astirrer carried by the frame, and means mounted upon the frame foroperating the stirrer. l

A dough-mixer comprising a supporting-frame which is provided at one endwith a terminal hook for engagement with the rim of a receptacle, theopposite end of the frame being provided with spaced arms to rest uponthe opposite portion of the rim of the receptacle, a hooked slidableclamping member carried by the frame between the arms with its hookarranged to engage the rim of the receptacle, a stirrer carried by theframe, and means carried by the frame to rotate the stirrer.

6. A dough-mixer comprising a supporting-frame provided at one end witha hook to engage the rim of a receptacle, the opposite end of the framebeing' provided with spaced arms to rest upon the opposite portion ofthe rim of the receptacle, a slidable clamping member Working betweenthe arms and provided at its outer end with a hook to engage the rim ofthe receptacle, said clamping member being provided with a longitudinalslot having upstanding shoulders at opposite ends, a fastening risingfrom the frame through the slot of the clamping member, and an eccentricmounted to rotate upon the fastening between and in cooperative relationwith the shoulders, a stirrer carried by the frame, and means mountedupon the frame for rotating the stirrer.

7. A dough-mixer comprising a supporting-frame, a tubular hub carried byand piercing the frame, a stirrer member having a shank portionrotatable in the hub and provided with a series of seats, a crank-handleconnected to the shank of the stirrer for simultaneous rotationtherewith, and a latch carried by the crank-handle for individualengagement with the seats of the stirrer, the stirrer being verticallyadjustable through the crank to permit engagement of the latch with theindividual seats. v

8. A dough-mixer comprising a support having a tubular hub piercing thesame, a stirrer having a shank rotatable Within the hub and adjustableendwise therethrough, said shank being provided with a series of seats,an operating-crank connected for simultaneous rotation With the shankand the latter capable of endwise adjustment therethrough, and alatch-lever mounted upon the crank for engagement with the individualseats of the sooner stirrer-shank to support the stirrer at differentelevations.

9. A dough-mixer comprising a 'frame having atubular hub piercing thesame and provided with an external annular channel, a stirrer having ashank portion rotatable within the hub, a crank-handle rotatable uponthe hub and connected to the shank ot' the stirrer, and means carried bythe crank-handle Vfor engagement with the annular channel to preventdisplacement of the handle.

10. A dough-mixer comprisinga Vframe having a tubular hub piercing thesame and provided With an external annular channel, a stirrer having ashank portion rotatable With in the hub` a crank-handle rotatable uponthe hub and connected to the shank, and. a latchlever carried by thecrank-handle and engaging the channel to prevent displacement of thehandle.

l l. A dough-mixer comprising a frame having a tubular hub piercing thesame and provided With an external annular channel, a stirrer having ashank rotatable Within the hub and provided with a series ot' seats, acrank-handle rotatable upon the hub and connected to the shank, alatch-lever fulcrumed upon the top of the crank for individualengagement with the seats of the shank, and

another latch-lever fulcrumed upon. the under side of the crank forengagement with the annular channel of the hub to prevent displacementof the handle.

12. A dough-mixer comprising a frame having a tubular hub piercing thesame, a stirrer having a non-circular shank portion rotatable Within thehub and provided with a series of seats, a crank-handle having a tubularjournal mounted to rotate in the hub with its bore non-circular for thereception of the non-circular portion of the shank of the stirrer, and alatch-lever mounted upon the crank-handle for engagement With theindividual seats of the stirrer-shank.

13. A dough-mixer comprising a frame having a tubular hub piercing thesame and provided with an external annular channel, a crank-handlehaving a tubular journal rotatable Within the hub and provided with anoncircular bore, a stirrer having a non-circular shank portion receivedWithin the journal and adjustable endwise therein and also provided witha series of seats, a latch-lever fulcrumed upon the crank-handle forengagement with the individual seats of the stirrer-shank, and anotherlatch-lever fulcrumed upon the crankhandle for engagement with theannular groove ot the hub.

ln testimony that l claim the foregoing as my own I have hereto aiixedmy signature in the presence of two Witnesses.

ELMER E. XVARD.

Witnesses:

N. V. BATES, JOHN H. PHELAN.

